The 21000-16-05-15-093-03-02 from Bently Nevada is a complete externally mounted proximity probe housing assembly. Specifically, this unit integrates a reverse-mount probe, a protective dome cover, and a 304 stainless steel sleeve into a single, pre-configured package. In addition, it is fully certified for use in explosive atmospheres, meeting the stringent requirements of the CSA and API 670 standards. Consequently, this assembly is the ideal solution for continuous monitoring of shaft vibration, thrust position, and eccentricity on turbines, compressors, and pumps. Most importantly, this listing is for a brand new unit in factory packaging, complete with a 12-month warranty.
The 21000 model offers various configuration options, and this specific unit (21000-16-05-15-093-03-02) includes the following detailed specifications.
Probe Option (Suffix 16): This assembly comes equipped with a 3300 XL 8 mm probe with a connector. This probe is widely recognized for its superior linear range and stability in demanding industrial environments.
Probe Cable Length (Suffix 05): The unit includes a 0.5 m (20 inches) integral probe cable. This length is ideal for installations where the junction box is located in close proximity to the housing.
Standoff Adapter (Suffix 15): It features a 1.5-inch (38 mm) standoff adapter. This component allows for flexible mounting and helps position the probe correctly relative to the target surface.
Probe Penetration (Suffix D=093): The probe penetration length is 9.3 inches (236.2 mm). Furthermore, the adjustment range for this option is ±0.5 inches (13 mm), providing fine-tuning capability during installation.
Fittings (Suffix 03): Included in the package are one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with three different grommets. These grommets accommodate cable sizes ranging from 1/8 to 3/8 inches.
Mounting Thread (Suffix 02): The housing utilizes a 3/4-14 NPT mounting thread. This is the default option and is standard for most industrial mounting applications.
Materials of Construction: The housing body is manufactured from aluminum, while the probe sleeve is made from durable 304 stainless steel. This combination provides excellent corrosion resistance and structural integrity.
The 21000 housing is engineered to perform reliably under extreme conditions. For instance, it is rated as a CSA Type 4 enclosure, ensuring protection against ingress of water and dust. Moreover, its hazardous area approvals cover Class 1 Divisions 1 and 2 Groups C and D, as well as Class 2 Divisions 1 and 2 Groups E, F, and G. Additionally, the temperature ratings are T5 at ambient temperatures from -50 °C to +40 °C, and T4 from -50 °C to +80 °C. The assembly weighs approximately 1.1 kg (2.4 lb) without fittings, making it relatively lightweight and easy to handle during installation.
Proper installation is critical to achieving accurate measurements from the 21000 housing assembly. First, for probe penetration lengths between 1.0 and 2.0 inches, you may need to counter-bore the machine case. This action helps to reduce side view or rear view effects that can degrade measurement accuracy.
Second, if the combined probe penetration length (C plus D) exceeds 300 mm (12 inches), you must add sleeve support near the probe. This prevents resonance from occurring, which could lead to erroneous readings or mechanical damage. For this specific model, the maximum C plus D dimension is 13.5 inches, which exceeds the 12-inch threshold; therefore, you should plan for additional support.
Third, note that the probe P/N and S/N may be displayed on a flag label for some combinations of the C and D options. This is particularly relevant when only a small section of the probe cable is visible, so always check the label before installation.
This 21000 assembly complies with Part 15 of the FCC Rules and meets the requirements of the RoHS Directive 2011/65/EU. Furthermore, it holds CSA certification for explosion-proof applications in North America. It is fully compliant with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings. When connected per drawing 140979, the circuit is non-incendive, adding an extra layer of safety for intrinsically safe applications.
Each new 21000-16-05-15-093-03-02 order includes the following components, all provided in original factory packaging:
One complete housing assembly with aluminum body and 304 stainless steel sleeve
One 3300 XL 8 mm reverse-mount proximity probe with connector
One 0.5 m integral probe cable
One 1.5-inch standoff adapter
One 3/4-14 NPT plug
One 3/4-14 to 1/2-14 NPT reducer
One cable seal grip with three grommets (1/8 to 3/16 inches, 1/4 to 5/16 inches, 5/16 to 3/8 inches)
One dome cover
Thread seal and O-rings
All orders are shipped via major international carriers, including FedEx, UPS, and DHL. We ensure that your 21000 housing is securely packed to prevent any damage during transit. Tracking information will be provided promptly after shipment.
Q1: What is the primary application for this 21000 housing assembly?
This 21000 housing is primarily used for non-contact vibration and position monitoring on critical rotating machinery, such as steam turbines, gas turbines, centrifugal compressors, and large pumps. It allows for precise measurement of shaft displacement relative to the bearing housing.
Q2: Is this unit intrinsically safe for use in hazardous areas?
Yes, the 21000 housing can be ordered with hazardous area approved proximity probes for intrinsically safe applications. The housing itself is CSA certified as explosion-proof for Class 1, Division 1 and 2, Groups C and D, and Class 2, Division 1 and 2, Groups E, F, and G.
Q3: Can I adjust the probe penetration after installation?
Yes, the probe penetration option D has an adjustment range of 13 mm (±0.5 inches). However, you should only make adjustments when the machine is shut down and follow Bently Nevada's recommended procedures to avoid damaging the probe or the target surface.
Q4: What is the significance of the C plus D dimension for this model?
For the 21000-16-05-15-093-03-02, the maximum C plus D dimension is 13.5 inches. Since this exceeds 12 inches, you must add sleeve support near the probe to prevent resonance. This ensures stable and accurate measurements over the long term.
Q5: What if I need a different cable length or probe option?
The 21000 series is highly configurable. You can order different suffix codes to customize cable lengths, probe types, standoff adapters, and penetration depths to suit your specific application requirements. Please contact us for assistance with other configurations.
| Brand Name | |
| Model No. | 21000-16-05-15-093-03-02 |
| Product Type | Probe Housing Assemblies |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
